Answer:The least sustainable ecosystem can be determined by analyzing the observations recorded in the table. To identify the least sustainable ecosystem, we need to consider factors such as biodiversity, ecological balance, and human impact.
First, let's look at the biodiversity column in the table. Biodiversity refers to the variety of different species in an ecosystem. An ecosystem with higher biodiversity is generally more sustainable because it can withstand disturbances and adapt to changes. Therefore, an ecosystem with lower biodiversity is more likely to be less sustainable.
Next, let's consider the ecological balance column. Ecological balance refers to the stability and interactions among the different species in an ecosystem. A well-balanced ecosystem is more likely to be sustainable because it can maintain its functions and services. If an ecosystem shows signs of ecological imbalance, such as an overabundance or scarcity of certain species, it may indicate a less sustainable state.
Finally, we should consider the human impact column. Human activities can significantly affect the sustainability of an ecosystem. If an ecosystem has high levels of human impact, such as pollution, deforestation, or overfishing, it is more likely to be less sustainable.
Based on these factors, we can analyze the observations in the table and determine which ecosystem is likely to be the least sustainable. Look for ecosystems with lower biodiversity, signs of ecological imbalance, or high levels of human impact. By comparing the observations in each column, you can identify the ecosystem that exhibits these characteristics and is therefore the least sustainable.